• FoafSites

These FOAF Sites are open social networking sites which host a large amount of 'Friend of a Friend' FOAF data. they generate it automatically for all users. If you know of sites not on the list, please add them.

Key to columns:

Example: An actual URI of a person. * An asterisk means there is alas no URI for the person themselves, only their FOAF file.

People: Approximate number of people (and therefore of FOAF files) if known.

Links out: In your profile, you can enter the URI of a FOAF identity you have on 'another' site.

OpenID Integration: Is there a foaf:openid value that gives the URI of the (X)HTML page used for OpenID authentication? The Inverse Functional nature of the foaf:openid property enables use of my OpenID on par with my Personal URI via an inference capable RDF User Agent (e.g. a SPARQL Processor). In addition, but not mutually exclusive to the prior usage scenario, can a single URI be used as a conduit to both my FOAF file and OpenID authentication page? Example: http://myopenlink.net/dataspace/person/kidehen is a URI that provides OpenID authentication while also exposing my FOAF file.

Thus, these two SPARQL statements would return the same results:

SELECT DISTINCT * where {<http://myopenlink.net/dataspace/person/kidehen> ?p ?o}

and

SELECT DISTINCT * where {<http://myopenlink.net/dataspace/person/kidehen#this> ?p ?o}

See also

• FoafOpenid - Using FOAF trust networks to block blog spam

• List of open social networking sites by Jen Golbeck. Great list, though not a wiki

• OpenSocial directory - List of FOAF Containers

Note: A better way to make this page would be to make it in the data wiki and mash it up here as a table.